Presented
by Jason Collier and Ricardo Garcia
Troubleshooting
- reading logs and asking the right questions, like
- What happened?
- When?
- Where?
- Who's affected?
- What is the Error message and/or symptom?
The Skype
for business client logs to the .uccapilog and .etl logs and the the
Application log in event viewer.
New
features in the Desktop client
Video based
screen sharing (VbSS)
Previously
all screen sharing was done with the Remote Desktop Protocol (RDP) which is
limited to a maximum of 8 frames per second and it runs over TCP. VbSS can go
up to 30 frames per second and can use the quicker "fire-and-forget"
protocol UDP. VbSS will also give a noticable faster call setup or start of the
screen sharing in an existing session. There is no visual indication in the
client to indicate if RDP or VbSS is being used for screen sharing, therefore
we need to examine the logs to see if it
works properly or not. Some sort of graphical indication and/or information about which
codec is being used might come in future releases of the client, (please go to www.skypefeedback.com to vote for this idea if you like it.) In the
SDP, RDP screen sharing is announced as
m=applicationsharing
53111 TCP/RTP/SAVP 127
and VbSS as
m=video
50054 RTP/SAVP 123 123
both media
types are offered and accepted in the SIP dialog due to fallback reasons. If
one of the clients in a meeting do not support VbSS RDP will be used as a
fallback and if you would like to force the meeting to use RDP rather than
VbSS, turn on recording. After a meeting has changed from VbSS to RDP it will
not fallback to VbSS even if circumstances change.
Also,
please note that VbSS is using UDP so make sure to open your firewalls when
enabling this feature, more information about this is available in the article:
Video based Screen Sharing for Skype for Business Server 2015. Audio is not
supported in VbSS, but a workaround might be to use the Virtual Audio Cable
software, and VbSS will not be in the RTM version of the Skype for business for
Mac client, but will come in a later update.
Offline
Messaging
Offline
Messaging uses Exchange Web Service (EWS), Exchange Server and the message
history spooler so it works even with a Lync 2010 server. EnableIMArchiving in
the client policy must be enabled for Offline Messaging to work.
PSTN
dialing and PSTN conferencing issues
PSTN
conferencing in Office 365 is a quite complex animal.
In Office
365 there is a user forest and a "PSTN resources" forest. This means
that a PSTN conference is two cascaded conferences in two separate MCUs.
Without dynamic conference IDs there is an issue with these two conferences not
getting connected. This issue is called a bar-belling failure (not "disappointing"
as the guy sitting in front of me in the audience suggested). The symptom for
the users are that VoIP users can hear VoIP users and PSTN users can hear PSTN
users, only. Also, the users might see an "Uninvited guest" in the
meeting. There are two ways of avoiding this to happen. Instruct your users to
use the "End meeting" function when leaving a meeting (but how well
is that going to work out?) Or contact support and ask them to enable your
tenant for dynamic conference IDs (and this is the real fix which is available
since September 1st, 2016.) Eventually all tenants will be fixed and this issue
should be a thing of the past.
In a Skype
for business meeting it is possible to actually “End a meeting”
Skype for
business for Mac
The
presentation continued with logs in the Mac client. All you need to know
about the old Lync for Mac 2011 client is summarized in this article: Removing Lync for Mac2011 :-)
The Mac
client has a dependency on the Certificate CRL - if a location to the CRL is
included in the certificate it must be accessible by the Mac computer. That is
accessible via http(s) and not LDAP. Also, be aware that a Windows CA does not
have an http(s) address to the CRL published by default, LDAP only.
Snooper
7.0.1168.1 will be released together with the Mac client, and this version can
open and parse Skype for business for Mac client logs.
Resources
for troubleshooting
- Skype forBusiness Troubleshooting Guide
- WinLister
- SublimeText - Texteditor
- UCMPParsers for Sublime
(unzip to %appdata%\Sublime Text 3\Packages\SfB) - Fiddler
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